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Method and device for realizing Make Before Break (MBB)

An upstream and optimal technology, applied in the field of data communication, can solve problems such as traffic interruption

Inactive Publication Date: 2017-03-15
ZTE CORP
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  • Application Information

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Problems solved by technology

[0015] In the existing method for implementing MBB, when LSR3 detects that the LDP session with LSR2 is disconnected, because the new tunnel has not been established yet, and the old tunnel is also cut off, the LSR3 waits to receive the MBB notification message. Flow interruption within set time

Method used

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  • Method and device for realizing Make Before Break (MBB)
  • Method and device for realizing Make Before Break (MBB)
  • Method and device for realizing Make Before Break (MBB)

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Embodiment Construction

[0047] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings, which cannot be used to limit the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and various manners in the embodiments can be combined with each other.

[0048] see Figure 4 , the present invention proposes a method for realizing MBB, including:

[0049] Step 400. The node detects the LDP between itself and the upstream node of the new optimal route within the preset time period when the node that detects that the upstream node of the optimal route between itself and the root node has changed waits for receiving the MBB notification message. After the session is disconnected, the node detects that the LDP session between itself and the upstream node of the new optimal route is restored, and the MBB negotiatio...

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Abstract

The invention discloses a method and device for realizing Make Before Break (MBB). The method includes the following steps: within a preset time of waiting for receiving an MBB notification message by a node when change of an upstream node of an optimal route between the node itself and a root node is detected, after the node detects disconnection of a Label Distribution Protocol (LDP) session between the node and an upstream node of a new optimal route, the node detects recovery of the LDP session between the node itself and the upstream node of the new optimal route, and MBB negotiation between the node and the upstream node of the new optimal route succeeds, a label mapping message carrying an MBB mark is sent to the upstream node of the new optimal route, and the preset time is reset. The method and device for realizing MBB ensures no interruption of flow within the preset time of waiting for receiving the MBB notification message.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method and device for realizing MBB (Make Before Break). Background technique [0002] Multicast Virtual Private Network (MVPN, Multicast Virtual Private Network) is an Internet Protocol (IP, Internet Protocol) VPN based on the existing Border Gateway Protocol (BGP, Border Gateway Protocol) / Multiprotocol Label Switching (MPLS, Multiprotocol Label Switching) Based on the technology that supports multicast services, this technology encapsulates private network multicast packets and transmits them through the multicast tunnels established between network segments to complete the transmission of multicast data between private networks . [0003] figure 1 It is a schematic diagram of the structural composition of a typical MVPN network. Such as figure 1 As shown, when device 1 of VPN1 and device 2 of VPN2 or device 3 of VPN3 perform multicast data forwarding, the customer-side ...

Claims

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Application Information

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IPC IPC(8): H04L12/723H04L12/721H04L12/757H04L45/50
CPCH04L45/023H04L45/12H04L45/50
Inventor 张洁
Owner ZTE CORP
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